我让我的程序显示存储在json文件中的按钮列表。我将每个按钮的存储时间honey与当前时间time.time()和用户输入的delay进行比较。
由于某些原因，条件条件仅在有一个按钮时才起作用。一旦添加了其他按钮，程序将第一个按钮变为绿色以指示其为早，而新按钮变为黄色以指示其为早期。新按钮变成红色后，第一个按钮也变成红色。
我已经为程序计时，并且程序在正确的时间运行。为什么会有这个问题，我该如何解决？代码：
class MainApp(App):
def build(self): # build() returns an instance
self.store = JsonStore("streak.json") # file that stores the streaks:
Clock.schedule_interval(self.check_streak, 1/30.)
return presentation
def check_streak(self, dt):
for child in reversed(self.root.screen_two.ids.streak_zone.children):
honey = float(child.id)
with open("streak.json", "r") as read_file:
data = json.load(read_file)
for value in data.values():
if value['delay'] is not None:
delay = int(value['delay'])
if delay > time.time() < honey: # early (yellow)
child.background_normal = ''
child.background_color = [1, 1, 0, 1]
elif delay > time.time() > honey: # on time (green)
child.background_normal = ''
child.background_color = [0, 1, 0, 1]
elif delay < time.time() > honey: # late (red)
child.background_normal = ''
child.background_color = [1, 0, 0, 1]
def display_btn(self):
# display the names of the streaks in a list on PageTwo
with open("streak.json", "r") as read_file:
data = json.load(read_file)
for value in data.values():
if value['delta'] is not None:
print(f"action={value['action']}, delta={value['delta']}, grace={value['delay']}")
streak_button = StreakButton(id=str(value['delta']), text=value['action'],
on_press=self.third_screen, size=(400,50),
size_hint=(None,None))
self.root.screen_two.ids.streak_zone.add_widget(streak_button)
total = ((int(self.streak.day) * 86400) + (int(self.streak.hour) * 3600) +
(int(self.streak.minute) * 60)) # convert into seconds
self.current_time = time.time()
self.count = self.current_time + total
grace = (int(self.streak.delay) * 60) + self.count # aka delay
parsed = True
# delete later just used to test
print("[seconds:", total,']' , "[action:", self.streak.action,']',
"[grace:", grace,']')
# store streak attributes inside "streak.json"
self.store.put(self.streak.action, action=self.streak.action,
delay=grace, seconds=total,
score=0, delta=self.count)
streak.json文件：{"one": {"action": "one", "delay": 1557095861.2131674, "seconds": 60, "score": 0, "delta": 1557095801.2131674}, "two": {"action": "two", "delay": 1557096131.7338686, "seconds": 60, "score": 0, "delta": 1557096071.7338686}}
答案 0 :(得分：1)
它仅适用于一个按钮，因为if...elif语句位于for循环之外。
将if...elif块移到if value['delay'] is not None:循环内的for块中。
def check_streak(self, dt):
for child in reversed(self.root.screen_two.ids.streak_zone.children):
honey = float(child.id)
with open("streak.json", "r") as read_file:
data = json.load(read_file)
for value in data.values():
if value['delay'] is not None:
delay = int(value['delay'])
# fix for later
if delay > time.time() < honey: # early (yellow)
child.background_normal = ''
child.background_color = [1, 1, 0, 1]
elif delay > time.time() > honey: # on time (green)
child.background_normal = ''
child.background_color = [0, 1, 0, 1]
elif delay < time.time() > honey: # late (red)
child.background_normal = ''
child.background_color = [1, 0, 0, 1]
答案 1 :(得分：0)
问题是有两个循环导致我的数据不匹配。我需要能够遍历按钮对象并且仅对每个对象使用正确的json文件字典条目，或者遍历json文件并仅修改相应的子对象。我决定使用前者。
我设置了代码，以便为streak_zone name = child.text
然后我将json文件中的每个键与按钮名child
如果键的名称等于name，那么我们得到嵌套键delay的值
新代码：
def check_streak(self, dt):
for child in reversed(self.root.screen_two.ids.streak_zone.children):
honey = float(child.id)
name = child.text
with open("streak.json", "r") as read_file:
data = json.load(read_file)
for key in data.keys():
if key == name:
delay = data.get(key, {}).get('delay')
if delay > time.time() < honey: # early (yellow)
child.background_normal = ''
child.background_color = [1, 1, 0, 1]
elif delay > time.time() > honey: # on time (green)
child.background_normal = ''
child.background_color = [0, 1, 0, 1]
elif delay < time.time() > honey: # late (red)
child.background_normal = ''
child.background_color = [1, 0, 0, 1]